Operating Instructions Model Hc-300; Maintenance; Motor Brush Replacement; Machine Storage - RIDGID HC-450 Operator's Manual

HC-450/HC-300 Hole Cutting Tools
Operating Instructions
Model HC-300
WARNING
Do not use a hole cutting tool without proper eye
protection.
1. The Model HC-300 is turned on by depressing an
ON/OFF switch located on the side of the unit behind
the feed wheel. (Figure 20)
Figure 20 – Model HC-300 ON/OFF Switch
2. Feed the hole saw into the pipe by turning feed
wheel handle counterclockwise using moderate force
so as to not overload the motor.
Keep fingers and hands away from the
WARNING
saw blade. Do not reach across the hole saw or wear
loose gloves or clothing that may become entangled and
cause serious injury.
3. Rotate feed handle counter-clockwise to apply down-
ward pressure on the hole saw.
WARNING Forcing hole saw into pipe will not re-
duce cutting time. Therefore, do not overfeed saw while
cutting. Doing so will result in premature saw failure or
possible serious injury.
4. After completing the hole cut, retract the saw from the
pipe by turning the feed wheel clockwise.
NOTE! When branching off an existing pipe system,
use a hole saw with the
helps retain the pipe slug in the hole saw.
5. Turn unit OFF by depressing ON/OFF switch to the
OFF position.
6. Remove unit by:
A. Unclamping entire assembly or
B. Retrieving motor assembly by pulling plunger
and then unclamping the base.
12
1 / " pilot drill. The pilot drill
4
Ridge Tool Company
7. Brush away all metal chips created by the hole saw
from the area around the hole.
NOTE! The flat area with the RIDGID lettering in the
back of the base and the machined areas on
the side of the posts are designed for level mount-
ing. They are useful when series of holes need to
be aligned.

Maintenance

WARNING
Always unplug power cord before servicing the
hole saw.

Motor Brush Replacement

Check motor brushes every 6 months and replace when
worn to less than 1 / ". If commutator is worn, the outer di-
2
mension of the commutator should be turned and the
mica should be undercut before replacing the brushes. This
should only be done by qualified personnel.

Machine Storage

Motor-driven equipment must be kept in-
WARNING
doors or well-covered in rainy weather. Store the ma-
chine in a locked area that is out of reach of children
and people unfamiliar with hole cutters. This machine
can cause serious injury in the hands of untrained users.

Service and Repair

WARNING
The "Maintenance Instructions" will take care of most of
the service needs of this machine. Any problems not ad-
dressed by this section should only be handled by an au-
thorized RIDGID service technician.
Tool should be taken to a RIDGID Independent Authorized
Service Center or returned to the factory. All repairs
made by Ridge service facilities are warranted against de-
fects in materials and workmanship.